Spring-motor control.



N. PEDERSEN.

SPRING MOTOR CONTROL. APPLlCATION FILED ocr. 10. 1916 1,301,873. Patented Apr. 29,1919.

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A3 A 11% 3 I g P G k a a N, PEDERSEN.

SPRING MOTOR CONTROL.

APPLICATION FILED oer 10. 19W;

Patented Apr. 29, 1919.

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A, attozmu N. PEDERSEN.

SPRING MOTOR CONTROL.

APPLICATION FILED OCT. I0. wa s Patented A pr. 29, 1919.

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i coil UNITED STATES PATENT onrron NIELS PEDEBSEN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNGR T0 ARTHUR BROGK,

JR, 013 PHILADELPHIA, PENNSYLVANIA.

SPRING-MOTOR CONTROL.

Specification of Letters Patent.

Patented Apr. 29, 1919.

To all whom it may concern:

Be it known that I, Nuns PEDERSEN, a citizen of the United States of America,and a resident of the city and county of Philadelphia, in the State of Pennsylvania, have invented a certain-new and useful Improvement in Spring-Motor Controls, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part thereof.

The general object of my present invention is to provide an effective combination with a spring motor actuated camera suspended from, or otherwise flexibly mounted upon an aeroplane or other air craft, of

speed regulating means for the camera motor including a manually adjustable device supported independently of the camera and preferably mounted on a fixed part of the air craft.

The. various features of novelty which characterize my invention are pointed out with particularity in the claims annexed to and forming a part of this specification. For a better understanding of the invention, however, and the advantages possessed by it, reference should be had to the acccennanying' drawings and descriptive matter in hich T have illustrated and described preferred embodiments of my invention.

@i the drawings:

Figure l is an elevation of a portion of an aeroplane on which is mounted a spring en camera provided with a form 4 rel mechanism preferred fer su h a view taken similarly to showing a modification;

i i": Y s a sectional plan tairen tr tine i an on a r 1- e Ci 6 d a ge s al ,n

elevation illns he fuselage or is driver and a seat A for the observer. Mounted below the seat A is a camera B wlnch is connected to the frame work by a universal coupling comprising gimbal frames C and D. N This permits the camera to maintam to a substantial extent a fixed vertical axis notwithstanding pitching'and rolling movements which the air craft'may experience.

It is unnecessary for an understanding of the present invention to describe the camera mechanism inclosed within the camera housing further than to say that it comprises a main actuating spring motor E, a portion of which is shown in Fig. 2, and that the speed of operation of the main motor is directly controlled by a second auxiliary spring motor F or timing mechanism by means of which the cam wheels F mounted on the spring barrel l? of the auxiliary motor are the only parts illustrated. A camera mechanism of this type is disclosed in detail in the application, Serial No. 118,959, filed jointly by L. J. R, Holst and myself on September 8, 1916.

The timing mechanism or auxiliary motor F hasits spring barrel F journaled on the winding shaft 1*. The spiral driving spring F 4 of the auxiliary motor F has its inner end secured to the shaft F and its outer end secured to the spring barrel F in which the spring is inclcsed. The spr", barrel F has secured to it a spur gear which is coaxial with the x2 mesh with a small gear EF secured to the shaft of an es'capement disk or wheel Cotiperating with the escapem is an escapement anchor 8 carrie shaft? to which is also seemed lever pound pendulum. The lever connected at its lower en to meat F of the compound. pinand slot connection comprises a pin F by pen element F working in rac med in one side of the pendulum element A The penduium element F compris e a body portion in the form of a d sl: iiy wheel, which has a supporting a ienrnaled in the two forks of the 1 a lever F The latter 1S s aft F journaled in 1r in the perticular construction disclosed the Winding shaft F carries a, gear F in mesh with the gear E forming a part of the main motor E with the result vthat the spring F of the auxiliary motor is normally Wound up by the main motor as fast as it unWin s and thereby through the cams F permits of a corresponding movement of the main motor. The initial tension of the auxiliary motor spring I? may be adjusted by means 01' the external knob F on the shaft F and the pawl and ratchet connection between the shaft F and the gear F formed by the pawl F 21 secured to the gear F and the ratchet Wheel F secured to the shaft F 1 he combination with a main motor oi en auxiliary spring controlling motor having its driving spring kept under tension by the main motor While novel with me forms no part'of the present invention but is disclosed and claimed in my prior application, Serial No. 95,890, filed May 6 1916,

The lever F is angularly adjusted to thereby vary the frequency of vibration of the compound pendulum controlling the speed of the motor F by means of a cam l, the shaft i of which is journaled in the frame Work of the motor F. The com ll bee-rs at its edges against a roll F journaled in the adjacent end of the lever F The roll F is held against the periphery oi the cam l by a spring F Secured to the cam l and coaxial therewith is a gear Wheel I in mesh with a Worm l which is journal'ed in the frame Work of the motor F and the stem or she-ft coupling i to a shaft section I nroject throu h and ourneled in the housin of Y 13 J l A TV camera 53 1 ii. r i a W The snait l LS connected to operetn 13:. LL T q shalt G of e manuelly aetuated gust mechanism G o nted on the d o. of the ooservers sent "r or o T 1 v other col mlbelili' $011M; A 11!: "Mzin 3 TC- wlni i' a o mansinsslon 15. when,

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am on. oins he eolnle I 1 V ions to one otnen and connect a r Al I ,6 l i J Pu i tin l"'6 she-J? echenisrn G or II'lSCi ny e sh ing, when "ec re of which is connected hythe menses in mesh with the gear G and secured to the countershaft G and a large spur gear G secured to the countershaft G and iii mesh with a small spur gear G? which is secured to the end of the shaft G With the particular mechanism described, one-complete rotation of the arm G serves to give the cam one complete turn, though,

as shown, less than one turn of the cani l imports the full throw to the lever F 9. {he the same time, the screw and Worinconnec- 'tion providedlcetvzeen the shaft '1? end the earn 1 revents an aossihilit of the lad; l y

modate the escapement relewfing angular movement oi the pendulum element F increases and diminishes. vibration of the pendulum as a Whole is increased and diminished by decreasing and increasing, respectively, the amplitude-of the angular movement of the pendulum element spring '1 carried by the frame Work of the motor F is arranged to engage the periphery of the pendulum element F and arrest the motion of the letter and ther by step the motor as the high point of the is moved into engegeinent with the lever The mechanism described permits of e sensitive, accurate and reliahie control amera mechanism Withou subjecting era housing: to torques o -ctio-nahly e swinging movements era relative he h with ti e

The frequency of axially adjustable on the shaft F and telescoping with the section F The fan section F comprises a hub portion F which rests on the curved upper edges of the forks of a bifurcated lever F whleh is supported and eangularly adjusted just as is the lever F. of the construction first described, and which difi'ers from the lever F only in the shape of a portion of the lever engaging the hub portion F ofthe fan section F With the apparatus shown in Figs. 6 and 7 the effect of the angular adjustment of the lever F is to increase or diminish the effective length of the fan and thereby to increase or diminish the retarding effect and thus to reduee or increase the speed of the motor FA.

In the form of speed controllingmechanism illustrated in Fig. 8, the spring motor FB proper is essentially the same as the motor F shown in Figs. 2 and 3 except in the form of the compound element employed. In Fig. 8 the pendulum element F secured to the escapement anchor shaft may be substantially identical with the element F of Figs. 1, 2 and 3. The cooperating pendulum F in this form has its supporting shaft F directly journaled in the frame work of the motor FB. The pendulum element F comprises diametrically opposed arms on which are mounted adjustable weights F and comprises horns F between which is located a device F employed to directly limit the permitted range of angular movement of the pendulum element F As shown, the element F is carried by a'shaft F which also carries a worm gear F in mesh with a Worm F The shaft F carrying the Worm F extends through the camera housing BB or other casing inclosing the motor F B, and is connected by the coupling F to some suitable adjusting mechanism by a flexible shaft HA.

In the operation of this form of my invention the shaft F is adjusted to move the member F between the full and dotted line positions shown. \Vhen the member F is in the full line position the pendulum element F is positively held against oscillation and the operation of the motor F B is thereby arrested. When the member F is in the dotted line position the motion of the pendulum element F is unrestrained and the motor FB operates at minimum speed. In intermediate positions of the member F the throw of the pendulum element F is restricted with the result that the s d of the motor FB is cut down more or ess accordingly as the throw of the pendulum element F is restricted less or more. Novel features of construction and arrangement of the timing mechanism disclosed, but not claimed herein, are claimed in my application, Serial Number 212,902, dated January 15, 1918, as a division of this case.

While in accordance with the rovisions of the statutes I have illustrated and described the bestforms of my invention now known to me, it will be apparent to those skilled in the art that changes can be made in the form of the apparatus disclosed without departing from the spirit of my invention, and that some features of my invention may sometimes be used with advantage without a corresponding use of other features.

Having now described my invention, what I claim as new and desire to secure by. Let

ters Patent, is

lating means for the camera motor including 1 an adjustable part mounted on the camera, a manually adjustable device supported independently of the camera, and a flexible shaft extending between said part and said shaft.

3. In combination a sup ort, a camera mounted thereon with free om for adjustment and comprising a spring motor and an angularly adjustable speed regulating element for the motor, and operating means for said element comprising a worm, and a cooperating worm gear through which the rotation of the Worm is transmltted to said element and a flexible shaft leading to the 105 camera for rotating said worm.

NIELS PEDERSEN. 

